Accessory for an energy storage and power supply device



FIG. 1 is a front perspective view of an accessory for an energy storage and power supply device of the claimed design; and,

FIG. 2 is a left side view thereof.

The broken line showing of the accessory for an energy storage and power supply device represents unclaimed subject matter and forms no part of the claimed design. 

CLAIM We claim the ornamental design for an accessory for an energy storage and power supply device, as shown and described. 